Need to blur left side of drone shots

[blue edge]

Been honing my drone skills with a real estate job. The disgruntled neighbour wants all reference to his property deleted from the shots.
This is major undertaking for me as Im pretty new to AE - Im using AE 2015 on win10 pro.

I can either delete whole shots or blur his property.

For asthetic reasons I choose the later but dont know how to do it.

Here is a link to two of the shots that need left side blur...where the 2 white lines are (a driveway) and all to the left of that -
https://youtu.be/P4mC_RrmDNA

Id really appreciate it if someone can help me achieve the aim.

Im doing this to keep the peace for my friend, whose place I have filmed, otherwise it would remain.
thx blue edge

[JPT7505]

Just mask the area and add a Gaussian blur, most likely use an adjustment layer.

[Michael_Szalapski]

You can use the compositing options on the blur effect to just make it effect certain areas. That means you could use the mask tracking if you wanted to give it a go, but manually keyframing might be faster for a drone shot.